mistutored
/ˌmɪsˈtjuːtəd/ /mɪsˈtʃuːtəd/rare
adjective
Badly instructed or brought up.
Origin
Mid 18th century; earliest use found in Thomas Edwards (1729–1785), Church of England clergyman and schoolmaster. From mis- + tutor + -ed, probably after well-tutored.